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IB ESS SL 6.1.1 Atmosphere Boundary Questions

Practise IB ESS SL 006.001.001 by applying atmosphere boundary concepts to environmental systems questions.

Syllabus
First assessment 2026
Course
ESS SL
Level
SL

Exam points

  • identify nitrogen and oxygen as the two major gases shown in the tropospheric composition chart
  • read a gas-composition chart and match labels to the correct molecular gases and proportions
  • distinguish atmospheric gas identity from its later role in atmospheric processes and environmental change

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Study 6.1.1—Atmosphere boundary conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB ESS SL 6.1.1 Atmosphere Boundary Questions question 1

[Maximum number: 1]
Gas composition of the troposphere by volume

Figure:Gas composition of the troposphere by volume

the tropospheric gas-composition chart shown above below is a pie chart showing the percentages (by volume) of gases in the troposphere.

Label gases A and B on the tropospheric gas-composition chart shown above above.

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